The base is original from the producer (chords and melodies), but is complemented with elements that complement the song that come from samplepacks, usually, vocal chops, guitars, wobbles sections, glitch effects. It is the standard in which most of producers work, in a project you will find MIDI files made by the producer, but also melodic loops.
Bassline, Chords, Synth made in Serum from scratch (No presets used)
Pluck, Brass, and Sub Bass from Nexus and small Sting loop from Kshmr pack (Pitched and edited)
Used in the project: Serum, Nexus, Valhalla Supermassive, Kickstart.
Sample pack Sounds of KSHMR Vol. 3
Loop name KSHMR_String_Loop_07_128_A#.wav